当第一个文本框输入的字符达到一定程度就会自动跳转到下一个文本框
如何实现？？
html部分
html
EventUtil对象
var EventUtil = {
addHandler: function (element, type, handler) {
if (element.addEventListener) {
element.addEventListener(type, handler, false);
} else if (element.attachEvent) {
element.attachEvent('on' + type, handler);
} else {
element['on' + type] = handler;
}
},
removeHandler: function (element, type, handler) {
if (element.removeEventListener) {
element.removeEventListener(type, handler, false);
} else if (element.detachEvent) {
element.detachEvent('on' + type, handler);
} else {
element['on' + type] = null;
}
},
getEvent: function (event) {
return event ? event : window.event;
},
getTarget: function (event) {
return event.target || event.srcElement;
},
preventDefault: function () {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
},
stopPropagation: function () {
if (event.stopPropagation) {
event.stopPropagation();
} else {
event.cancelBubble = true;
}
}
};
js部分
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